From: willy@linux.intel.com (Matthew Wilcox)
Subject: [PATCH] NVMe: Avoid caculate cq head doorbel in nvme_process_cq()
Date: Tue, 3 Sep 2013 11:53:16 -0400 [thread overview]
Message-ID: <20130903155316.GY4707@linux.intel.com> (raw)
In-Reply-To: <A103C806EC8D6E46A0D950DAA4D118D1400E0096@szxeml558-mbx.china.huawei.com>
On Mon, Sep 02, 2013@06:49:34AM +0000, Huhaiyan (haiyan) wrote:
> We use 2 pointers, one for sq tail doorbell, the other for cq head doorbell in struct nvme_queue, to avoid calculate cq head doorbell in nvme_process_cq().
> This change can reduce latency for the admin/io command.
Have you been able to measure a difference? If so, can you share
relative numbers?
next prev parent reply other threads:[~2013-09-03 15:53 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.3257.1377730793.1059.linux-nvme@lists.infradead.org>
2013-09-02 6:49 ` [PATCH] NVMe: Avoid caculate cq head doorbel in nvme_process_cq() Huhaiyan (haiyan)
2013-09-03 15:53 ` Matthew Wilcox [this message]
2013-09-04 9:15 ` Haiyan Hu
2013-09-04 16:51 ` Matthew Wilcox
2013-09-05 8:55 ` Haiyan Hu
2013-09-05 19:28 ` Matthew Wilcox
[not found] <A103C806EC8D6E46A0D950DAA4D118D1400E0067@szxeml558-mbx.china.huawei.com>
2013-09-02 7:00 ` Qiang Huang
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